# Low cost feedthrough for an acrylic vacuum chamber

I am currently building myself a "hobby" vacuum chamber from 1 inch tickness acrylic sheets (I am very aware that acrylic is not the proper material). Inner dimensions of the the chamber is 40x40x40mm. After a few simulations in Solidworks, safety factor and displacements seemed okay.

What I need is to feed 8 cables through the sheets. After a research, I couldn't find any airtight cable gland or any low cost vacuum feedthrough. What is your suggestion for a low cost feedthough?

Liquid tight cable glans are cheap, and many manufacturers make them. If you have a productive enough vacuum pump, it may be able to keep up with small air leakage through them. You could also add grease inside the gland.

• – Phil Sweet Sep 9 '18 at 13:13

A sparkplug is air tight and provides an electrical feedthru for very high voltages.

(The body of the plug is resistive ( between about 40 $\Omega$ and 1 k$\Omega$) and sometimes inductive - check the specs)